Re: VMware for Cyrus?

2009-11-09 Thread Bron Gondwana
On Mon, Nov 09, 2009 at 09:23:18AM -0500, John Madden wrote: > FWIW, I won't run anything on hardware anymore unless I absolutely have > to. To me, the benefits of running virtualized outweigh the pitfalls -- > dealing with real OS installs on real hardware, dealing with > multipathing and SAN

Re: VMware for Cyrus?

2009-11-09 Thread Pascal Gienger
John Madden schrieb: > FWIW, I won't run anything on hardware anymore unless I absolutely have > to. To me, the benefits of running virtualized outweigh the pitfalls -- > dealing with real OS installs on real hardware, dealing with > multipathing and SAN (virtual disks are easy), etc. Our Cyru

Re: VMware for Cyrus?

2009-11-09 Thread Kenneth Marshall
On Mon, Nov 09, 2009 at 03:35:53PM +0100, Sebastian Hagedorn wrote: > --On 9. November 2009 07:51:34 -0600 Kenneth Marshall wrote: > >> I will go ahead and chime in here. If and only if your I/O usage is >> well understood and managed, would a VM option work. As others have >> mentioned, any amoun

Re: VMware for Cyrus?

2009-11-09 Thread Sebastian Hagedorn
--On 9. November 2009 07:51:34 -0600 Kenneth Marshall wrote: I will go ahead and chime in here. If and only if your I/O usage is well understood and managed, would a VM option work. As others have mentioned, any amount of heavy I/O will take out or slow dramatically every VM that needs any I/O

Re: VMware for Cyrus?

2009-11-09 Thread John Madden
>> The main advantage that ESX would offer is in employing VMotion, >> VMMware HA and such. It adds a layer of complexity, but also a layer >> of security and convenience. We're about to virtualize our environment, albeit on Xen rather than ESX. (It's been my experience that Xen performs bette

Re: VMware for Cyrus?

2009-11-09 Thread Kenneth Marshall
On Mon, Nov 09, 2009 at 02:35:53PM +0100, Sebastian Hagedorn wrote: > --On 9. November 2009 14:10:54 +0100 Simon Matter > wrote: > >> While virtualization has advantages it has also disadvantages. One thing >> is that it introduces an additional layer of complexity into the game. >> It's my impre

Re: VMware for Cyrus?

2009-11-09 Thread Forrest Aldrich
Sebastian Hagedorn wrote: > --On 9. November 2009 14:10:54 +0100 Simon Matter > wrote: > >> While virtualization has advantages it has also disadvantages. One thing >> is that it introduces an additional layer of complexity into the game. >> It's my impression that in many areas virtualization

Re: VMware for Cyrus?

2009-11-09 Thread Sebastian Hagedorn
--On 9. November 2009 14:10:54 +0100 Simon Matter wrote: While virtualization has advantages it has also disadvantages. One thing is that it introduces an additional layer of complexity into the game. It's my impression that in many areas virtualization gets introduced not because of technical

Re: VMware for Cyrus?

2009-11-09 Thread Simon Matter
> Thanks for your reply! > > --On 9. November 2009 07:24:22 -0500 Adam Tauno Williams > wrote: > >> We run a ~500-600 connection Cyrus in ESX. But that isn't ~2,500. >> There are so many variables here. > > True ... > >> How much I/O your hypervisor can absorb depends on the same thing as a >> me

Re: VMware for Cyrus?

2009-11-09 Thread Sebastian Hagedorn
Thanks for your reply! --On 9. November 2009 07:24:22 -0500 Adam Tauno Williams wrote: We run a ~500-600 connection Cyrus in ESX. But that isn't ~2,500. There are so many variables here. True ... How much I/O your hypervisor can absorb depends on the same thing as a metal system - the u

Re: VMware for Cyrus?

2009-11-09 Thread Adam Tauno Williams
On Mon, 2009-11-09 at 08:55 -0300, Reinaldo de Carvalho wrote: > On Mon, Nov 9, 2009 at 8:43 AM, Sebastian Hagedorn > wrote: > > --On 9. November 2009 08:37:46 -0300 Reinaldo de Carvalho > > wrote: > >> You need analyse the I/O consumition. > >> # iostat -d 1 > > I trust real world experiences mo

Re: VMware for Cyrus?

2009-11-09 Thread Reinaldo de Carvalho
On Mon, Nov 9, 2009 at 8:43 AM, Sebastian Hagedorn wrote: > --On 9. November 2009 08:37:46 -0300 Reinaldo de Carvalho > wrote: > >> You need analyse the I/O consumition. >> >> # iostat -d 1 > > I trust real world experiences more than benchmarks ... either people on > this list have successfully

Re: VMware for Cyrus?

2009-11-09 Thread Sebastian Hagedorn
--On 9. November 2009 08:37:46 -0300 Reinaldo de Carvalho wrote: You need analyse the I/O consumition. # iostat -d 1 I trust real world experiences more than benchmarks ... either people on this list have successfully run Cyrus under ESX or they haven't. I don't want to be the first to tr

Re: VMware for Cyrus?

2009-11-09 Thread Reinaldo de Carvalho
On Mon, Nov 9, 2009 at 8:23 AM, Sebastian Hagedorn wrote: > Hi, > > today I've learned that the Dell hardware our mail servers run on is out of > support, because it's more than 5 years old (time flies ...). We were > planning an upgrade from RHEL 3 to RHEL 5 anyway, but now we will try to > accel

VMware for Cyrus?

2009-11-09 Thread Sebastian Hagedorn
Hi, today I've learned that the Dell hardware our mail servers run on is out of support, because it's more than 5 years old (time flies ...). We were planning an upgrade from RHEL 3 to RHEL 5 anyway, but now we will try to accelerate that procedure somewhat. Our systems group is pushing VMware